'Mercy' is an obsessively expressive Adagio (so to say, a Samuel Barber's eauivalent for woodwinds) with a homophonic texture, like a four part chorale. Rhythmically, this piece presents offers no problems.While the first part requires more experienced players, parts 2,3 and 4 are relatively easy to play. Most groups would be able to master this piece after only a couple of rehearsals.